NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 509
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 3
NEW CINGULAR WIRELESS PCS, LLC 2
EXIANT COMMUNICATIONS LLC 2
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-10-06 509-816-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2020-10-06 509-816-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2020-10-06 509-975-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2020-10-05 509-502-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2020-10-05 509-502-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2020-10-05 509-606-9XXX 9000–9999Assigned HD CARRIER LLC 321J SPOKANE WA
2020-10-05 509-644-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F LOON LAKE WA
2020-10-05 509-816-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2020-10-05 509-816-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2020-10-05 509-816-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2020-09-24 509-508-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2020-09-24 509-508-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2020-09-23 509-506-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-09-18 509-339-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2020-09-16 509-403-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2020-09-16 509-403-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2020-09-16 509-403-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2020-09-16 509-403-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2020-09-16 509-403-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2020-09-16 509-403-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2020-09-01 509-502-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2020-09-01 509-957-1XXX 1000–1999Assigned NUSO, LLC 478J SPOKANE WA
2020-08-25 509-312-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2020-08-18 509-207-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REPUBLIC WA
2020-08-18 509-510-5XXX 5000–5999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 OTHELLO WA
2020-08-18 509-519-5XXX 5000–5999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 MATTAWA WA
2020-08-18 509-913-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2020-08-13 509-504-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K YAKIMA WA
2020-08-11 509-336-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2020-08-11 509-338-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2020-08-11 509-595-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2020-08-11 509-715-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2020-08-11 509-870-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2020-08-07 509-504-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-504-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-504-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-504-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-504-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-504-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-504-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-08-07 509-866-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2020-08-03 509-593-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WALLAWALLA WA
2020-07-31 509-219-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E STEVENSON WA
2020-07-29 509-683-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DOUGLASCO WA
2020-07-23 509-508-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J SPOKANE WA
2020-07-23 509-668-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2020-07-15 509-239-3XXX 3000–3999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 EDWALLTYLR WA
2020-07-15 509-257-5XXX 5000–5999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 SPRAGUE WA
2020-07-15 509-659-2XXX 2000–2999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 RITZVILLE WA
2020-07-15 509-721-8XXX 8000–8999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 DAVENPORT WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.